I have been using a Tuff cloth for a few months now and it seems to work exactly as advertised. I have not field-tested it since I have been in a training environment for the last several months. However I used it on several knives and very old and worn blued guns that are all very prone to rusting. I wiped them down and put them in there cases three months ago and all are still perfect. I am currently in an extremely humid beach location with very erratic temperature swings (lots of condensation and salt air).
The web site is www.sentrysolutions.com
I know every one claims the SEALS use their product but I have been told by others in the "business" that they do regularly use these products. The Marine Tuff Cloth in particular is good for heavy salt-water exposure. Several of the big saltwater fishermen in the area use it to maintain their equipment. I think I read a discussion about it on Tacticalforums.com several months ago.
Hope this helps.

I have used Tuf-Cloth on knives and other metal items that need to be kept "dry" for a number of years and it has worked well for me. No rust or fingerprints.
A tip- Brownells sells the Tuf-Glide liquid for $17.95 ($11.95 C&R) for an 8oz bottle. This will "recharge" your Tuf-Cloth many, many times or allow you to make your own by saturating a soft cotton cloth and storing it in an airtight container between uses.
[url]www.brownells.com/aspx/NS/store/ProductDetail.aspx?p=12801[/url]

This stuff is great. applies a dry film coating on the gun that makes it look good and protects it also. smells better than some of the other CLP's. I know of a a pistol that was left exposed to the rain for almost 2 days and did not have any rust on the parts that typically do rust.
Ruff